Liquistation CSF48 Inputs: Conductivity
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NaCl compensation
In the case of NaCl compensation (as per IEC 60746), a fixed non-linear curve specifying the
relationship between the temperature coefficient and temperature is saved in the device. This
curve applies to low concentrations of up to approx. 5 % NaCl.
Compensation for natural water
A non-linear in accordance with ISO 7888 is saved in the device for temperature compensation
in natural water.
Ultrapure water compensation (for conductive sensors)
Algorithms for pure and ultrapure water are stored in the device. These algorithms take the
dissociation of the water and its temperature dependency into account. They are used for
conductivity values up to approx. 100 μS/cm.
•UPW NaCl: Optimized for pH-neutral contamination.
• UPW HCl: Optimized for measuring the acid conductivity downstream of a cation exchanger.
Also suitable for ammonia (NH
3
) and caustic soda (NaOH).
User-defined tables
You can save a function that takes the properties of your specific process into account. To do so,
determine the value pairs made up of the temperature T and conductivity with:
• (
0
) for the reference temperature T
0
• (T) for the temperatures that occur in the process
Use the following formula to calculate the values for the temperatures that are relevant in your
process:
Values must be constantly increasing or decreasing.
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